"David S. Miller" <[email protected]> writes:
> Takashi-san, have you ever investigated using kprobes to
> implement this feature? It seems a perfect fit, and would
> allow support on several architectures other than just x86
> and x86_64.
>
> If kprobes does not meet your needs completely, it could
> be trivially extended to do so.
kprobes would require an exception for each patchpoint because
it uses an trap instruction.
Probably a bit too costly for commonly used functions. Especially
on a P4 exceptions are quite costly.
But you could add lightweight kprobes that just use jmp
for it in the kprobes framework, that might be useful for other stuff too
-Andi
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